vokaalsete
Vokaalsete is a linguistic term used in Estonian to refer to a group or class of vowels and to vowel-related properties described in grammatical or phonological contexts. The form is derived from the adjective vokaalne (vowel-related) with the plural genitive ending -sete, and it typically appears in phrases that describe sets of vowels within a noun phrase. For example, vokaalsete helide hääldus means the pronunciation of vowel sounds, where vokaalsete modifies the plural noun helide (sounds) in the genitive.
In everyday Estonian, the standalone noun for vowels is vokaalid. However, when describing vowels as a subset
Phonological context: Estonian has a nine-vowel system, comprising a, e, i, o, u, ä, ö, ü, õ.
See also: Estonian phonology, Vowels (vokaalid), Morphology of Estonian adjectives, Genitive case, Vowel length in Estonian.